Process of manufacturing vehicle-tires



A. 1. ROUSSEY.

PROCESS OF MANUFACTURING VEHICLE TIRES. APPLICATION FILED JUNE 3, 1921. 1,389,221. Patented Aug- 30, 1921.

INVENTOR Arno-s Rouaaej 8!; M- w. XML,

A TTORNEY 1 UNITED ST TES" PATENT: ornea-J.

ames ritoussny, or roar WAYNE, slim,

i not'z'nss or AN FACTURING VEHIoLE-TiRES.

' Application filedfiune3, 1921. Serial no. 475L845; 1

T0 all whom it may concern:

Be it known that I, A'MosJ. Roussnr', a citizen oftlie United States residing atFort WVayne, in the county. of Allen and State of Indiana, have invented new and useful Improvements in Processes of Manufacturing Vehicle-Tires, of which the following is a specification. p

The invention relates to the manufacture of vehicle tires and particularly tothe manufacture of the type of tires commonly known as wrapped tread tires. V

Heretofore the desired patterns or con figurations have been applied to the treads of vehicle tires by placing theraw tread on the fabric body and inserting the whole into a circular form or mold having the configurations formed on its inner face. An air bag is inserted within the body. and filled with air under pressure to force the tread.

into the mold. The air bag is expensive and g has but short life. Another method is to construct a sectional circular mold. insert the body with raw tread thereon into the mold and apply hydraulic pressure exter nally to the'mold to force the same on to the tread. Here the tread frequently enters the joints between the sections of the mold, the

fabric following the tread into said joints.

hen the tire thus made up is vulcanized-- the presence of the fabric in the tread pro duces a defective tire.

pressure upon the body and tread of the tire in order to secure the desiredconfigurations on the tread. i I V I accomplish the invention by impressing the desired configurations on the. raw tread without vulcanizing it and without assembling it on the tire'bodyor carcass and then in one operation vulcanizethe tire body and tread together. V

In carrying out my method I form a flat metallic mold of suitable length having therein the desired configurations for the tread and arrange adjacent thereto suitable means for heating it, such as a steam" line or coil. I then buildup thetread of desired thickness and length out of rubber and place it on the mold; then apply suflicient pressure to the tread to cause it when The apparatus to produce the external pressure is very ex softened bythe heat of the mold to enter the depress ons in-the mold, the+h'eat being insuflicient to'vulcanize the tread. After about seven minutes the tread is removed from the mold, the material of the mold being such that the rubber will not stick to it but will readily separate from it.

clear anddistinct manner. The body or raw carcass of the tire has been built up of rubberized fabric in the. usual manner. carcass is placed on a circular or wheel like form' and the! tread is placed thereon in. proper alinement therewith. The depres- This Specification f Letters Patent. Patented Aug. 30. 1921.

i The pattern of r the mold is thereby applied to the tread in or 'vulcanizing. 'VVhen fully Vulcanized the 1 article is removed from the heater, thetape is removed-and the paste taken out of the indentations ofthe tread and the completed tire'is removed from the form.

Theoperations are very quickly performed and the completed tire has atread freefrom defectsiand having the design therein clear 7 cut." One vulcanization only of the tire is required and the expensive air bag or external pressure producing apparatus iseliminated, thus accomplishinga large saving in equipment and labor and time.

In the accompanying drawings 1' have illustrated a simple means by which the in vention may bepractised, in which Figure 1 is a plan view of a} mold, by j which selected configurations may be applied tothe tread; Fig. 2 an elevationalfview of the-samejFig. 3 a side elevational view of the treadinstalled on the tire body or carcass ready for vulcanization and Fig. 4 an endelevational View of the same.

In the drawings, lO'indicates the flat mold having any desired pattern 11 formed therein. 12 indicates astea-m pipe to heat;

the mold. '13 are screws or jacks by which pressure is applied toa block 14 placed on the raw tread 15. the block is forced down'on thetread topress By tightening the screws v the latter 'into the mold. as the tread is softened by the heated mold. Any desirable means'for pressing the raw tread onto the mold will sufii'ce for my purposes.

What I} claim is:

1. The process of forming tire treads cone sisting inpressing the tread in a rawstate upon a slightly heated flat mold; then applying the tread to a tire body or raw carcass and securing the same thereon and then subjecting the said body and tread to a vulcanizing heat..

2. The process of forming tire treads consisting in pressing the tread in araw state upon a slightly heated flat mold formed of metal; then applying the tread to the periphery of va raw tire carcass and securing the same thereon by tape andfinallvsubjecting the carcass and treadtoa vulcanizin heat.

3. I The processof forming tire treads consisting in pressing the tread in a raw state 15 upon a heated flat mold having thereon the desired pattern or configurations to form said pattern u on said tread; then applying the tread to tie periphery of a raw tire carcass and Wrapping a tape about the tread and 20 scribed my name this 1st day of June, 1921. 25

AMOS Jnoussnr. 

